21212702970 has 32 divisors (see below), whose sum is σ = 50914319040. Its totient is φ = 5656295040.

The previous prime is 21212702957. The next prime is 21212702981. The reversal of 21212702970 is 7920721212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754465 + ... + 782075.

It is an arithmetic number, because the mean of its divisors is an integer number (1591072470).

Almost surely, 2^21212702970 is an apocalyptic number.

21212702970 is an abundant number, since it is smaller than the sum of its proper divisors (29701616070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21212702970 is a wasteful number, since it uses less digits than its factorization.

21212702970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53230.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 21212702970 in words is "twenty-one billion, two hundred twelve million, seven hundred two thousand, nine hundred seventy".